What will be the result of typeof function() {} in JavaScript?
A). function
B). object
C). undefined
D). method
Which type conversion happens automatically in the expression 3 + '5'?
A). Number to String
B). String to Number
C). Boolean to String
D). Number to Boolean
What is the initial type of a variable declared with let a;?
A). null
B). number
C). undefined
D). object
What is the result of the following code: let x = 5; x = 'hello'; console.log(typeof x);?
A). number
B). string
C). undefined
D). object
What will typeof null return in JavaScript?
A). null
B). undefined
C). object
D). number
What is the result of typeof [] in JavaScript?
A). array
B). object
C). list
D). undefined
Given the code: let y = 10; y = true;, what is the type of y after execution?
A). number
B). boolean
C). string
D). object
Which operator is used to determine the type of a variable in JavaScript?
A). typeof
B). instanceof
C). type
D). isType
What will be the result of the following code: let z = '123'; z = Number(z); console.log(typeof z);?
A). string
B). number
C). undefined
D). boolean
What does the isNaN function do?
A). Checks if a value is not a number
B). Converts a value to a number
C). Checks if a value is a number
D). Converts a value to NaN